Mixed-Metal Oxo Clusters Structurally Derived from Ti₆O₄(OR)₈(OOCR')₈

Area of Science:

• Inorganic Chemistry
• Materials Science
• Coordination Chemistry

Background:

• Mixed-metal oxo clusters are versatile compounds with tunable properties.
• Titanium alkoxides serve as key precursors for synthesizing complex inorganic structures.
• Understanding the assembly of metal ions in oxo clusters is crucial for developing new materials.

Purpose of the Study:

• To synthesize and characterize novel mixed-metal oxo clusters incorporating various transition and alkaline earth metals with titanium.
• To investigate the structural diversity and assembly of these clusters.
• To explore the potential of these clusters as building blocks for advanced materials.

Main Methods:

• Reaction of titanium alkoxides with metal acetates and methacrylic acid.
• Synthesis of FeTi5, Zn2Ti4, Cd4Ti2, Ca2Ti4, and Sr2Ti4 oxo clusters.
• Structural characterization of the obtained mixed-metal oxo clusters.

Main Results:

• Successful synthesis of five distinct mixed-metal oxo clusters: FeTi5O4(OiPr)4(OMc)10, Zn2Ti4O4(OiPr)2(OMc)10, Cd4Ti2O2(OAc)2(OMc)10(HOiPr)2, [Ca2Ti4O4(OAc)2(OMc)10], and [Sr2Ti4O4(OMc)12(HOMc)2].
• The structures are derived from a Ti6O4(OR)8(OOCR')8 core.
• Calcium and strontium derivatives form extended chains of condensed clusters.

Conclusions:

• The study demonstrates a facile route to novel mixed-metal oxo clusters with diverse metal combinations.
• The structural analysis reveals a core Ti cluster unit that can be functionalized with different metals.
• The formation of extended chain structures in Ca and Sr derivatives suggests potential for developing coordination polymers or network materials.